Detected over 8 billion+ scam calls in 2025
Leading Scam Protection & Scam Detection App – Block Scam Calls, Spam & Fraud Instantly
Truecaller is a scam protection and scam detection app that helps you detect scam calls, identify unknown numbers, and block spam, robocalls, and fraud attempts in real time. With advanced caller ID, AI call scanning, and a global community reporting suspicious numbers, you get real-time scam alerts before you answer.
How does Truecaller's scam and fraud call protection work?
Scam Detection: How Truecaller Detects Scams
Our top spammer and scammer list is not just a static list — it's a live and always updating defense network at your disposal that uses both crowdsourced real-time insights and pattern recognition on calls.
Crowdsourced Real-Time Defense: Truecaller relies on its 450 million active users to report scams instantly. If a new "Tax Fraud" scam starts at 9:00 AM and the Truecaller community flags it by 9:05 AM, the number is burned for everyone else immediately.
Pattern Recognition: The AI looks for inhuman behavior, it constantly monitors calling trends and frequency across the global network. By spotting sudden spikes in suspicious activity or unusual calling patterns, Truecaller can proactively flag potential threats before they even reach your phone.
The "Traffic Light" Warning System
For instant scam recognition, we use color codes on our caller ID so you know what to do before you answer a call:
- Red Screen: Danger. This number has been reported as spam or fraud by the community and our ML models. Do not answer.
- Green Screen: Safe. This is a Verified Caller ID. Truecaller checks official documents to prove the number belongs to a legitimate public entity (like a police station or embassy or businesses) so you know it's not a scammer spoofing the name.
- Purple Screen: Priority. Used for time-sensitive verified calls like deliveries!
We stop at least 12 million scam calls daily!
407 million fraud calls detected in last 30 days
Accuracy & Avoiding False Positives
How do we stop a normal person from being marked as spam by a prankster?
- User Credibility: A few isolated reports from "trolls" won't ruin a number’s reputation. Our algorithms require reports from a wide, diverse community to trigger a spam label.
- Dynamic Correction: If a legitimate number gets wrongly flagged, the owner can request a review. Also, if users start tapping "Not Spam" on a flagged number, our AI quickly re-evaluates and removes the red label if it finds it as a legitimate request.
Real World Impact & Government Use
Our Caller ID and Spam Blocking has evolved into a public safety tool in many regions.
- Police Partnerships: The Delhi Police signed an official pact (MoU) with Truecaller to verify official police numbers. This stops scammers from pretending to be officers to extort money from citizens.
- Diplomatic Safety: The Swedish Embassy in India became a "Verified Business" on the app. This ensured that when embassy staff called regarding visas, people knew it was real and not a fraudster.
- State-Level Cyber Safety: The Government of Karnataka partnered with Truecaller to run statewide cyber safety training and awareness campaigns for citizens.
- Covid-19 Crisis: During the pandemic, we launched a "Covid Hospital Directory" allowing users to find confirmed numbers for hospitals and emergency services when misinformation was rampant.
With Truecaller, prevent fraud calls from getting through
Your phone won't ring for even a single scam call
Scam Detection and Protection App for Android: How to Auto-Block Scam Calls
You can set it to silently reject these calls on Truecaller app
For Android:
- Open Truecaller > Tap the three dots (Menu).
- Go to Settings > Block.
- Toggle "Block top spammers" to ON.
Pro Tip: Want total silence? Max Protection blocks all potential spam calls, not just the top offenders. This feature is available for our Android Premium users.
Best Scam Detection and Protection App for iPhone: How to Block Scam Calls
You can get scam call protection with Truecaller for iPhone by changing the following settings:
- Open iPhone Settings > Phone.
- Tap Call Blocking & Identification.
- Toggle all Truecaller switches to ON.
- Open the Truecaller app > Go to the Protect tab > Toggle "Auto-Block Top Spammers".
Did a scammer try calling you?
Truecaller’s Scam Blocking Earns User Trust
See what our users have to say regarding our scam and fraud protection
See what our users have to say regarding our scam and fraud protection
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Latest Phone Scams & Fraud Alerts
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Frequently Asked Questions on Scam Protection
A scam protection app identifies and blocks scam calls, spam numbers, robocalls, and fraudulent messages before they reach you. These apps use real-time caller identification, spam databases, AI detection systems, and user reports to warn people about suspicious activity. In these times, scam protection apps are essential as phone scams, impersonation fraud, and SMS phishing attacks continue to increase globally.
Taking all these into consideration, Truecaller is best scam protection app you could rely on - It has one of the largest community and also the one of the most advanced technologies to mark scam/spam calls.
Presently with advancement in technology, scammers are finding new ways to target people and their money.
- Scam calls impersonating banks and government agencies
- Fake delivery and refund scams
- OTP and WhatsApp verification fraud
- Investment and crypto scams
- Loan and job offer scams
The above are just a few of the most popular scams globally. Scammers only need one successful call. A scam protection app like Truecaller helps stop them before they reach you.
Many users consider Truecaller one of the best scam protection apps because it offers real-time caller ID, automatic spam blocking, AI call scanning, and a large spam reporting community.
You can block scam calls automatically by installing a scam protection app like Truecaller, which detects and blocks known top scam numbers in real time.
Trust your communication with Truecaller.
Trusted by over 450 million people, Truecaller is proud to be a leader in caller ID and spam blocking software as well as research around call and SMS harassment.